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REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
2
: Compatible, : Partial change required, × : Incompatible
Special relay in the case of MELSECNET (II) local
station
MELSECNET/H special relay
Number Name Description Number Name Description
Compat-
ibility
Precautions for
replacement
M9253
Master station
operation status
OFF : RUN or STEP
RUN status
ON : STOP or PAUSE
status
SW0084 to
SW0087
Each station CPU
RUN status
Stores the CPU
RUN status of each
station.
When the
MELSECNET II master
station is the
MELSECNET/H
specified control
station, the operation
status is distinguished
by the corresponding
bit of the control station
specified on SW0084 to
SW0087.
M9254
Operating status of
other local stations
OFF : RUN or STEP
RUN status
ON : STOP or PAUSE
status
SB0084
Each station CPU
RUN status
OFF : All stations
RUN or STEP
RUN status
ON : Stations in the
STOP or
PAUSE status
exist
M9255
Local station error
on stations other
than host station
OFF : Normal
ON : Abnormal
SB0074
Cyclic transmission
status of each
station
OFF : All stations
normal
ON : Station where
cyclic
transmission
is not
executing
exist
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